I have just moved a 7 month old pullet in with my 3 month pullets after quarantine. The 7 month old is laying and I had her on layer feed during the quarantine. But since the others are not - I have the whole little flock on a good local feed mills flock feed. I have oyster shell and egg shells available. Will the younger ones not eat those just because they don't need them. They were very curious about it when I put it out but I'm hoping that as the newness wears off they won't eat much of it. Is there anything different I should be doing?